Gear pump structure capable of guaranteeing concentricity of eccentric shaft disc and used for filling dairy products

Abstract

The utility model discloses a gear pump structure capable of guaranteeing concentricity of an eccentric shaft disc and used for filling dairy products, and belongs to the technical field of food filling machinery. Comprising a pump body, the left end of the pump body is provided with a feed port and a discharge port, and the right end of the pump body is provided with a first air inlet and outlet and a second air inlet and outlet; the separation disc is positioned at the right end of the pump cavity; the sealing disc is arranged in the pump cavity in a left-right displacement manner; the star wheel is rotationally arranged in the pump cavity; the right end of the eccentric shaft is connected with the left side of the eccentric shaft disc, the eccentric shaft disc is arranged in the pump cavity in a left-right moving mode, a crescent block is formed on the left side face of the eccentric shaft disc, the left end of the eccentric shaft corresponds to the lower portion of the crescent block, and the star wheel is arranged at the left end of the eccentric shaft. And a horizontal cantilever which is formed in the center of the right side surface of the eccentric shaft disc in a horizontal cantilever state, is fixed to the sealing disc at a position corresponding to the center of the sealing disc, and is supported on the pump cover at a position of the pump cover. The gear pump has the advantage that the overall effect of the gear pump is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to food filling mechanical technical field, specifically relates to a gear pump structure for dairy product filling capable of guaranteeing eccentric shaft disc concentricity. BACKGROUND

[0002] The production of dairy products has a complex industrial process, for example, it specifically relates to raw material processing, mixing, sterilization, homogenization, aging, freezing, filling, hardening and packaging. The foregoing filling belongs to the last process, and the advantages of gear pump filling at least include: meeting the precise flow control requirements; good adaptability to high-precision media; good self-suction capacity and pressure stability; meeting the no-dead-angle cleaning requirements to reflect the safety and health of food; relatively small power consumption of the equipment; low maintenance cost; ideal production flexibility, for example, different formulas and different properties of dairy products can be switched as needed; easy to control, etc. Based on the foregoing factors, but not limited to, the use of gear pumps for filling dairy products has almost become a conventional choice in the industry. Of course, in addition to the various ice creams commonly seen by people, dairy products also include milk, cream, butter and other dairy products. In addition, various sauce products can also be filled with gear pumps.

[0003] In the disclosed Chinese patent documents, there are technical information related to the gear pump for filling the dairy products, such as CN201771755U (food processing gear pump) and CN201794783U (food processing gear pump), etc.

[0004] Typically, as recommended in the patent application publication number CN101846068A, the "structure improved food processing gear pump", the right side of the eccentric shaft disc of this patent, i.e. the central position of the side facing the pump cover of the gear pump, extends a sliding seat, which is movably supported at the central position of the static setting partition disc. The right end of the sliding seat extends to the right side of the partition disc and is fixed with the movable sealing disc between the partition disc and the pump cover through a flat key, and is locked by a locking screw and the thread on the connecting head of the sliding seat. In turn, a positioning bolt is screwed into the sliding seat from the right side of the pump cover through the positioning bolt hole preset at the central position of the pump cover, and the base of the positioning bolt is located on the right side of the pump cover and is in contact with the right side of the pump cover, i.e. the right side of the pump cover limits the positioning bolt.

[0005] In the above structure, the locating bolt supports the sliding seat of the eccentric shaft disc in a single-point manner, that is, the shaft body of the eccentric shaft disc is fixed by the locating bolt extending from the pump cover into the pump body. Thus, due to the gap between the locating bolt and the locating bolt hole preset in the central position of the pump cover, a slight deviation is easily caused by inertia during the operation of the gear pump, which affects the concentricity of the eccentric shaft disc. The concentricity of the eccentric shaft disc affects the fatigue of the eccentric shaft, the pitting corrosion of the tooth surface of the star-shaped wheel (impact load), the material flow pulsation, the filling accuracy, the reliability of the sealing components, and the like. Content of the Utility Model

[0006] The utility model discloses a gear pump structure for dairy product filling which can guarantee the concentricity of the eccentric shaft disc and avoid the adverse effects such as the fatigue of the eccentric shaft, the pitting corrosion of the tooth surface of the star-shaped wheel, the material flow pulsation, the filling error and the deterioration of the reliability of the sealing components.

[0007] The utility model discloses a gear pump structure for dairy product filling which can guarantee the concentricity of the eccentric shaft disc and avoid the adverse effects such as the fatigue of the eccentric shaft, the pitting corrosion of the tooth surface of the star-shaped wheel, the material flow pulsation, the filling error and the deterioration of the reliability of the sealing components.

[0008] In a specific embodiment of the utility model, the eccentric shaft disc concentricity guarantee mechanism includes eccentric shaft disc sliding seat, eccentric shaft disc sliding seat extension section, narrow transition section, locking nut fixed threaded head, eccentric shaft disc sliding seat extension section limiting nut and locking nut, eccentric shaft disc sliding seat constitutes in the central position of right side of eccentric shaft disc and with the partition disc sliding fit, eccentric shaft disc sliding seat extension section is constituted by the right side extension of eccentric shaft disc sliding seat and is matched with sealing disc in the central position corresponding to, narrow transition section is constituted by the right side extension of eccentric shaft disc sliding seat extension section and is supported in the central position of pump cover, locking nut fixed threaded head is constituted by the right side extension of narrow transition section and stretches to the right side of pump cover, eccentric shaft disc sliding seat extension section limiting nut is matched with eccentric shaft disc sliding seat extension section thread in the position corresponding to the right side of sealing disc, locking nut is matched with locking nut fixed threaded head thread in the position corresponding to the right side of pump cover.

[0009] In another specific embodiment of the utility model, a eccentric shaft disc sliding seat connector head fit hole is opened in the central position of the sealing disc, a key fit groove is constituted on the hole wall of the eccentric shaft disc sliding seat connector head fit hole, a key protruding from the surface of eccentric shaft disc sliding seat extension section is constituted on the surface of eccentric shaft disc sliding seat extension section and in the position corresponding to the key fit groove, the key is matched with the key fit groove; a narrow transition section fit hole is opened in the central position of the pump cover, and the narrow transition section is supported on the narrow transition section fit hole; an extension section limiting nut external thread is constituted on the eccentric shaft disc sliding seat extension section and in the area located on the right side of the key, the eccentric shaft disc sliding seat extension section limiting nut is matched with the extension section limiting nut external thread thread; the eccentric shaft disc sliding seat and the eccentric shaft disc constitute an integral structure.

[0010] In still another specific embodiment of the utility model, the side of the crescent block facing downward constitutes a concave arc surface, the left end of the eccentric shaft corresponds to the lower side of the concave arc surface; the star-shaped wheel rotatably sleeved on the left end of the eccentric shaft is matched with the gear disc teeth constituted on the right side of the gear disc and at the same time matched with the crescent block, the left side of the gear disc constitutes a gear disc rear end surface, a gear disc shaft is extended in the central position of the gear disc rear end surface, and the gear disc shaft is connected with a power transmission device.

[0011] In still another specific embodiment of the utility model, the power transmission device is directly connected with the gear disc shaft; the sealing disc disc rim of the sealing disc constitutes a seal with the cavity wall of the pump cavity; the space between the opposite sides of the eccentric shaft disc and the partition disc constitutes a first air cavity communicated with the first air inlet and outlet, and the space between the opposite sides of the partition disc and the sealing disc constitutes a second air cavity communicated with the second air inlet and outlet.

[0012] In still another specific embodiment of the present application, the positions of the feeding port and the discharging port are staggered with each other, and the position of the feeding port on the pump body corresponds to the rear end surface of the die plate, while the position of the discharging port on the pump body corresponds to the die teeth of the die plate; a feeding groove is recessed in the pump cavity, and the feeding groove corresponds to the position below the feeding port, the feeding groove is communicated with the discharging port and forms a 90° positional relationship with the discharging port.

[0013] In still another specific embodiment of the present application, a positioning pin is fixed on the side surface of the sealing disc facing the pump cover, and a positioning pin limiting sleeve is fixed on the side surface of the pump cover facing the sealing disc and at a position corresponding to the positioning pin; the positioning pin penetrates into the positioning pin limiting sleeve and cooperates with the positioning pin limiting sleeve.

[0014] In still another specific embodiment of the present application, at least one eccentric shaft disc sealing ring groove is formed on the eccentric shaft disc rim of the eccentric shaft disc, and an eccentric shaft disc sealing ring is embedded in the eccentric shaft disc sealing ring groove to form a sealing fit between the eccentric shaft disc and the cavity wall of the pump cavity.

[0015] In still another specific embodiment of the present application, a disc rim sealing ring for blocking the first air cavity and the second air cavity is sleeved on the disc rim of the partition disc, and a disc limiting snap ring for limiting the partition disc is arranged around the circumferential direction of the cavity wall of the pump cavity at positions corresponding to the left side and the right side of the partition disc, respectively, and the disc limiting snap ring is in contact with the edge portion of the side surface of the partition disc.

[0016] In still another specific embodiment of the present application, a disc rim sealing ring for sealing the second air cavity b is sleeved on the disc rim of the sealing disc, and the disc rim sealing ring is in sealing fit with the cavity wall of the pump cavity; in the use state, the first air inlet and outlet port and the second air inlet and outlet port are connected with the pipeline of the compressed air generating device, and the compressed air generating device is an air compressor, a turbo expander or a hydraulic pneumatic accumulator.

[0017] The technical scheme provided by the present application can guarantee the concentricity of the eccentric shaft disc by the eccentric shaft disc concentricity guarantee mechanism, thereby avoiding problems such as fatigue of the eccentric shaft, tooth surface pitting corrosion of the star wheel, pulsation of material flow, filling error exceeding the allowable range, and deterioration of the reliability of the sealing component, and significantly improving the overall effect of the gear pump. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is an embodiment structure diagram of the present application;

[0019] Figure 2 isFigure 1 The eccentric shaft dismounting screw is shown as being screwed into the eccentric shaft head dismounting screw fixing hole. DETAILED DESCRIPTION

[0020] In order to enable persons skilled in the art to more clearly understand the technical essence and beneficial effects of the present application, the present application will be described in detail in the following manner by way of examples, but the description of the examples is not a limitation on the technical scheme of the present application, and any equivalent transformation made only in form but not in substance according to the concept of the present application should be regarded as falling within the scope of the technical scheme of the present application.

[0021] In the following description, the directional or positional concepts of up, down, left, right, front and back are all relative to the position of the present application, and thus should not be understood as a special limitation on the technical scheme provided by the present application. Figures 1 to 2 In the following description, the directional or positional concepts of up, down, left, right, front and back are all relative to the position of the present application, and thus should not be understood as a special limitation on the technical scheme provided by the present application.

[0022] Please refer to Figure 1 and Figure 2 , a pump body 1 is shown, the left end of the pump body 1 has a feed inlet 11 and a discharge outlet 12, the feed and discharge outlets 11, 12 are communicated with a pump cavity 13 of the pump body 1, as shown by Figure 1 and Figure 2 , the feed inlet 11 located at the upper part of the left end of the aforementioned pump body 1 and the discharge outlet located at the lower part of the left end of the pump body 1 are not on the same longitudinal axis, more specifically, the positions of the two on the pump body 1 are staggered (to be described in detail below), the right end of the pump body 1 has a first air inlet and outlet 15 (may also be referred to as "first air inlet and outlet hole") communicated with the pump cavity 13 and a second air inlet and outlet 16 (may also be referred to as "second air inlet and outlet hole"), and a pump cover 14 is arranged on the right end face of the pump body 1 by a set of spaced distribution, as shown by Figure 1The right end face of the pump body 1 is provided with a pump cover fixing screw hole 17c for a set of pump cover fixing screws 142, a partition plate 2 is positioned at the right end of the pump cavity 13 corresponding to the first and second air inlet and outlet ports 15 and 16, and the partition plate disc edge of the partition plate 2 is sealed with the cavity wall of the pump cavity 13, a sealing disc 3 is movably arranged in the pump cavity 13 at the position on the right side of the partition plate 2, and the sealing disc disc edge of the sealing disc 3 is sealed with the cavity wall of the pump cavity 13, a star wheel 4 is rotatably arranged in the pump cavity 13 corresponding to the discharge port 12, an eccentric shaft 5 and an eccentric shaft disc 6 are connected, the right end of the eccentric shaft 5 is connected with the eccentric shaft head hole 61 on the left side of the eccentric shaft disc 6, the eccentric shaft disc 6 is movably arranged in the pump cavity 13 at the position on the left side of the first air inlet port 15, and the eccentric shaft disc disc edge of the eccentric shaft disc 6 is sealed with the cavity wall of the pump cavity 13, a crescent block 62 is formed on the left side surface of the eccentric shaft disc 6, the left end of the eccentric shaft 5 corresponds to the lower side of the concave arc surface 621 of the crescent block 62, and the star wheel 4 is rotatably arranged at the left end of the eccentric shaft 5.

[0023] The technical points of the technical scheme provided by the utility model are as follows: the structure system of the gear pump further comprises an eccentric shaft disc concentricity guarantee mechanism 9, the eccentric shaft disc concentricity guarantee mechanism 9 is arranged in the central position of the right side surface of the eccentric shaft disc 6 in a horizontal cantilever state and extends to the right side of the pump cover 14 through the sealing disc 3 and the pump cover 14 in sequence at the central position corresponding to the sealing disc 3 and the pump cover 14, wherein the central position corresponding to the sealing disc 3 is fixed with the sealing disc 3, the position of the pump cover 14 is supported on the pump cover 4, and the right side of the extension position of the pump cover 4 is limited.

[0024] Continued to see Figure 1 And Figure 2 The eccentric shaft disc concentricity guarantee mechanism 9 comprises an eccentric shaft disc sliding seat 91, an eccentric shaft disc sliding seat extension section 92, a narrowing transition section 93, a locking nut fixed screw head 94, an eccentric shaft disc sliding seat extension section limiting nut 95 and a locking nut 96, the eccentric shaft disc sliding seat 91 is directly arranged in the central position of the right side surface of the eccentric shaft disc 6 and is connected with the partition plate central hole 22 of the partition plate 2, Figure 2As shown in the drawing, the eccentric shaft disc sliding seat extension segment 92 is extended from the right side of the eccentric shaft disc sliding seat 91 and matches with the sealing disc 3 at the central position corresponding to the sealing disc 3, the narrowing transition segment 93 is extended from the right side of the eccentric shaft disc sliding seat extension segment 92 and is supported at the central position of the pump cover 14, the locking nut fixed threaded head 94 is extended from the right side of the narrowing transition segment 93 and extends to the right side of the pump cover 14, the eccentric shaft disc sliding seat extension segment defines the nut 95 to be threaded with the eccentric shaft disc sliding seat extension segment 92 at the position corresponding to the right side of the sealing disc 3, and the locking nut 96 is threaded with the locking nut fixed threaded head 94 at the position corresponding to the right side of the pump cover 14.

[0025] As shown in the drawing, the eccentric shaft disc sliding seat extension segment 92 is extended from the right side of the eccentric shaft disc sliding seat 91 and matches with the sealing disc 3 at the central position corresponding to the sealing disc 3, the narrowing transition segment 93 is extended from the right side of the eccentric shaft disc sliding seat extension segment 92 and is supported at the central position of the pump cover 14, the locking nut fixed threaded head 94 is extended from the right side of the narrowing transition segment 93 and extends to the right side of the pump cover 14, the eccentric shaft disc sliding seat extension segment defines the nut 95 to be threaded with the eccentric shaft disc sliding seat extension segment 92 at the position corresponding to the right side of the sealing disc 3, and the locking nut 96 is threaded with the locking nut fixed threaded head 94 at the position corresponding to the right side of the pump cover 14. Figure 2 As shown in the drawing, the eccentric shaft disc sliding seat extension segment 92 is extended from the right side of the eccentric shaft disc sliding seat 91 and matches with the sealing disc 3 at the central position corresponding to the sealing disc 3, the narrowing transition segment 93 is extended from the right side of the eccentric shaft disc sliding seat extension segment 92 and is supported at the central position of the pump cover 14, the locking nut fixed threaded head 94 is extended from the right side of the narrowing transition segment 93 and extends to the right side of the pump cover 14, the eccentric shaft disc sliding seat extension segment defines the nut 95 to be threaded with the eccentric shaft disc sliding seat extension segment 92 at the position corresponding to the right side of the sealing disc 3, and the locking nut 96 is threaded with the locking nut fixed threaded head 94 at the position corresponding to the right side of the pump cover 14.

[0026] As shown in the drawing, the eccentric shaft disc sliding seat extension segment 92 is extended from the right side of the eccentric shaft disc sliding seat 91 and matches with the sealing disc 3 at the central position corresponding to the sealing disc 3, the narrowing transition segment 93 is extended from the right side of the eccentric shaft disc sliding seat extension segment 92 and is supported at the central position of the pump cover 14, the locking nut fixed threaded head 94 is extended from the right side of the narrowing transition segment 93 and extends to the right side of the pump cover 14, the eccentric shaft disc sliding seat extension segment defines the nut 95 to be threaded with the eccentric shaft disc sliding seat extension segment 92 at the position corresponding to the right side of the sealing disc 3, and the locking nut 96 is threaded with the locking nut fixed threaded head 94 at the position corresponding to the right side of the pump cover 14.

[0027] In the embodiment, the eccentric shaft head hole 61 is a circular truncated cone hole and is provided with an eccentric shaft head dismounting screw fixing hole 611 at the bottom, the right end of the eccentric shaft 5 is formed as a circular truncated cone body 51 which matches with the circular truncated cone hole, and the eccentric shaft dismounting screw 52 is axially arranged on the eccentric shaft 5 and extends from the left end of the eccentric shaft 5 to the right end of the eccentric shaft 5 and protrudes from the right end surface of the eccentric shaft 5 and is fixed in the eccentric shaft head dismounting screw fixing hole 611.

[0028] According to the professional knowledge, the diameter of the eccentric shaft head hole 61, i.e. the inner diameter, gradually decreases from left to right, and correspondingly, the taper of the circular cone body 51 is adapted to the eccentric shaft head hole 61, i.e. the taper gradually increases from left to right, so that the part of the circular cone body 51 at the right end of the eccentric shaft 5 and the eccentric shaft head hole 61 of the circular cone hole form a loose and easy plug-in and pull-out relationship. This kind of relationship is also called taper or taper relationship. This structure is the ideal design of the inventor of the application after long-term repeated simulation tests, which makes the eccentric shaft 5 and the eccentric shaft disc 6 convenient and fast to disassemble, because as long as the eccentric shaft disassembly screw 52 is loosened, i.e. the eccentric shaft disassembly screw 52 is withdrawn from the eccentric shaft head disassembly screw fixing hole 611, the eccentric shaft 5 and the eccentric shaft disc 6 can be separated by hand, and vice versa.

[0029] Please refer to Figure 2 and in combination with Figure 1 The star-shaped wheel 4 rotatably sleeved on the left end of the eccentric shaft 5 cooperates with the toothed disc teeth 71 formed on the right side of the toothed disc 7 and at the same time cooperates with the crescent block 62. The left side of the toothed disc 7 is formed as a toothed disc rear end face 72, and a toothed disc shaft 721 extends in the center of the toothed disc rear end face 72. The toothed disc shaft 721 is connected with a power transmission device 8.

[0030] As shown in Figure 2 , a mechanical seal 7211 is arranged on the toothed disc shaft 721 of the toothed disc rear end face 72, and a bearing seat 7212 is fixed to the left end face of the pump body 1 by a set of fastening screws 72121. The material introduced from the feeding port 11, such as ice cream material, first reaches the toothed disc rear end face 72, is collected into the feeding groove 131 mentioned below, and is then output from the discharge port 12 by the cooperation of the star-shaped wheel 4, the crescent block 62 and the toothed disc teeth 71. Although the feeding port 11 and the discharge port 12 are respectively located above and below the left end of the pump 1, on the pump body 1, the discharge port 12 is located to the right of the feeding port 11 (i.e. lower right).

[0031] The power transmission device 8 is directly connected with the toothed disc shaft 721; the sealing disc rim of the sealing disc 3 is sealed with the cavity wall of the pump cavity 13; the space between the opposite sides of the eccentric shaft disc 6 and the partition disc 2 forms a first air cavity 17a communicated with the first air inlet and outlet port 15, and the space between the opposite sides of the partition disc 2 and the sealing disc 3 forms a second air cavity 17b communicated with the second air inlet and outlet port 16.

[0032] As mentioned above, since the eccentric shaft disc sliding seat 91 is directly formed at the central position of the right side surface of the eccentric shaft disc 6, the eccentric shaft disc sliding seat 91 is undoubtedly integrated with the eccentric shaft disc 6.

[0033] As mentioned above, the positions of the aforementioned feed port 11 and the aforementioned discharge port 12 are staggered with each other, and the position of the feed port 11 on the aforementioned pump body 1 corresponds to the aforementioned toothed plate rear end surface 72, while the position of the discharge port 12 on the pump body 1 corresponds to the aforementioned toothed plate tooth 71; a feed groove 131 is recessed in the aforementioned pump cavity 13, which corresponds to the below of the feed port 11, and the feed groove 131 is communicated with the aforementioned discharge port 12 and forms a 90° positional relationship with the discharge port 12.

[0034] Preferably, a positioning pin 31 is fixed on the side surface of the aforementioned sealing disc 3 which faces the aforementioned pump cover 14, while a positioning pin limiting sleeve 141 is fixed on the side surface of the pump cover 14 which faces the sealing disc 3 and at the position corresponding to the positioning pin 31, and the positioning pin 31 penetrates into the positioning pin limiting sleeve 141 and cooperates with the positioning pin limiting sleeve 141.

[0035] Preferably, a pair of eccentric shaft disc sealing ring grooves 63 are formed on the eccentric shaft disc flange of the aforementioned eccentric shaft disc 6, and an eccentric shaft disc sealing ring 631 for forming a sealing cooperation between the eccentric shaft disc 6 and the cavity wall of the aforementioned pump cavity 13 is embedded in the eccentric shaft disc sealing ring groove 63. The applicant needs to explain that if the number of the eccentric shaft disc sealing ring grooves 63 is increased (such as to three) or reduced (such as to one), it should be considered as a formal change rather than a substantial change and still belongs to the technical connotation scope disclosed by the utility model.

[0036] Preferably, a partition disc flange sealing ring 21 for blocking the aforementioned first air cavity 17a and the second air cavity 17b is sleeved on the partition disc flange of the aforementioned partition disc 2, and a partition disc limiting snap ring 132 for limiting the partition disc 2 is respectively arranged around the circumferential direction of the cavity wall of the aforementioned pump cavity 13 at the positions corresponding to the left side and the right side of the partition disc 2, and the edge part of the side surface of the partition disc 2 is in contact with the partition disc limiting snap ring 132.

[0037] Further, a sealing disc flange sealing ring 32 for sealing the aforementioned second air cavity 17b is sleeved on the sealing disc flange of the aforementioned sealing disc 3, and the sealing disc flange sealing ring 32 forms a sealing cooperation with the cavity wall of the aforementioned pump cavity 13; in the use state, the aforementioned first air inlet and outlet port 15 and the second air inlet and outlet port 16 are connected with the compressed air generating device pipeline. In the embodiment, the aforementioned compressed air generating device is an air compressor, but a turbo expander or a hydraulic pneumatic accumulator or other similar device can also be used.

[0038] With the working state as an example, the pressure air is introduced into the first air cavity 17a (the first air cavity 17b exhausts air) by the first air inlet 15, the eccentric shaft disc 6 moves left, and then the three of the tooth disc 7, the star wheel 4 and the crescent block 62 driven by the power transmission device 8 cooperate to the working state, the material such as ice cream material enters the rear end surface 72 of the tooth disc from the feeding port 11, and then reaches the feeding groove 131, and is extruded (discharged) from the discharge port 12 by the cooperation of the star wheel teeth 41 of the star wheel 4 and the tooth disc teeth 71.

[0039] When cleaning, the pressure air is introduced into the second air cavity 17b (the first air cavity 17a exhausts air) by the second air inlet 16, the sealing disc 3 moves right, and since the sealing disc 3 is an integral structure with the eccentric shaft disc sliding seat 63 of the eccentric shaft disc 6 (that is, the two are fixedly connected), the sealing disc 3 displaces right together with the eccentric shaft disc 6 through the eccentric shaft disc sliding seat 63, the cleaning liquid is introduced from the feeding port 11, and then enters the discharge port 12 from the position of the star wheel 4 and the tooth disc teeth 71 through the tooth disc rear end surface 72 and the feeding groove 131. In the above cleaning process, part of the cleaning liquid passes through the cooperation gap between the tooth disc 7 and the pump cavity 13, so that the tooth disc 7 can be cleaned as a whole, and the food hygiene during the next shift processing is ensured.

[0040] When the eccentric shaft 5 and the eccentric shaft disc 6 are cleaned, maintained and / or maintained regularly or irregularly, the fastening screw 72121 is loosened to separate the bearing seat 7212 from the left end face of the pump body 1, and the tooth disc 7 is removed, and the operator loosens the eccentric shaft dismounting screw 52 by a tool, that is, the eccentric shaft dismounting screw 52 is rotated away from the eccentric shaft head dismounting screw fixing hole 611 shown in the figure, so that the eccentric shaft 5 and the eccentric shaft disc 6 can be easily separated. Since the assembly process of the eccentric shaft 5 is opposite to the above, the applicant will not repeat it. Figure 2

[0041] As described above, the technical scheme provided by the utility model makes up for the shortcomings in the prior art by adopting the eccentric shaft disc concentricity guarantee mechanism 9, successfully completes the invention task, and truly realizes the technical effects described by the applicant in the above technical effect column.​

Claims

1. A gear pump structure for filling dairy products that can ensure the concentricity of the eccentric shaft disc, comprising a pump body (1), the left end of which has an inlet (11) and an outlet (12), the inlet and outlet (11, 12) communicating with the pump chamber (13) of the pump body (1), and the right end of the pump body (1) having a first air inlet / outlet (15) and a second air inlet / outlet (16) communicating with the pump chamber (13), and a pump cover (14) provided at the right end face of the pump body (1); a partition (2) and a sealing disc (3), the partition (2) being positioned at the right end of the pump chamber (13) corresponding to the position between the first and second air inlet / outlet (15, 16) and the edge of the partition (2) forming a seal with the cavity wall of the pump chamber (13), and the sealing disc (3) being disposed on the right side of the partition (2) with a lateral displacement. Inside the cavity (13), and the sealing disk edge of the sealing disk (3) is sealed to the cavity wall of the pump cavity (13); a star wheel (4) is rotatably disposed inside the pump cavity (13) at a position corresponding to the discharge port (12); an eccentric shaft (5) and an eccentric shaft disk (6), the right end of the eccentric shaft (5) is connected to the left side of the eccentric shaft disk (6), and the eccentric shaft disk (6) is disposed inside the pump cavity (13) in a position located to the left of the first air inlet / outlet (15), and the eccentric shaft disk edge of the eccentric shaft disk (6) is sealed to the cavity wall of the pump cavity (13), a crescent block (62) is formed on the left side of the eccentric shaft disk (6), the left end of the eccentric shaft (5) corresponds to the lower part of the crescent block (62), and the star wheel (4) is rotatably disposed at the left end of the eccentric shaft (5), characterized in that: Further included is an eccentric shaft disc concentricity guarantee mechanism (9) which is formed in a horizontal cantilever state at the central position of the right side of the eccentric shaft disc (6) and extends to the right side of the pump cover (14) through the sealing disc (3) and the pump cover (14) in sequence at the central positions corresponding to the sealing disc (3) and the pump cover (14), wherein the central position corresponding to the sealing disc (3) is fixed with the sealing disc (3), and the position of the pump cover (14) is supported on the pump cover (4) and is defined after extending to the right side of the pump cover (4).

2. The gear pump structure for the dairy product filling capable of securing the concentricity of the eccentric shaft disc according to claim 1, characterized in that: The eccentric shaft disc concentricity guarantee mechanism (9) includes an eccentric shaft disc sliding seat (91), an eccentric shaft disc sliding seat extension section (92), a narrowing transition section (93), a locking nut fixed threaded head (94), an eccentric shaft disc sliding seat extension section limiting nut (95) and a locking nut (96), the eccentric shaft disc sliding seat (91) is formed at the central position of the right side of the eccentric shaft disc (6) and is in sliding fit with the partition disc (2), the eccentric shaft disc sliding seat extension section (92) is formed by extending the right side of the eccentric shaft disc sliding seat (91) and is in fit with the sealing disc (3) at the central position corresponding to the sealing disc (3), the narrowing transition section (93) is formed by extending the right side of the eccentric shaft disc sliding seat extension section (92) and is supported at the central position of the pump cover (14), the locking nut fixed threaded head (94) is formed by extending the right side of the narrowing transition section (93) and extends to the right side of the pump cover (14), the eccentric shaft disc sliding seat extension section limiting nut (95) is in threaded fit with the eccentric shaft disc sliding seat extension section (92) at the position corresponding to the right side of the sealing disc (3), and the locking nut (96) is in threaded fit with the locking nut fixed threaded head (94) at the position corresponding to the right side of the pump cover (14).

3. The gear pump structure for the dairy product filling capable of securing the concentricity of the eccentric shaft disc according to claim 2, characterized in that: An eccentric shaft disc sliding seat connector fit hole (33) is formed at the central position of the sealing disc (3), a key fit groove (331) is formed on the hole wall of the eccentric shaft disc sliding seat connector fit hole (33), a key (921) protruding from the surface of the eccentric shaft disc sliding seat extension section (92) is formed on the surface of the eccentric shaft disc sliding seat extension section (92) at the position corresponding to the key fit groove (331), and the key (921) is in fit with the key fit groove (331); a narrowing transition section fit hole (143) is formed at the central position of the pump cover (14), and the narrowing transition section (93) is supported on the narrowing transition section fit hole (143); an extension section limiting nut external thread (922) is formed on the eccentric shaft disc sliding seat extension section (92) at the position corresponding to the right side of the key (921), and the eccentric shaft disc sliding seat extension section limiting nut (95) is in threaded fit with the extension section limiting nut external thread (922); and the eccentric shaft disc sliding seat (91) is formed in an integral structure with the eccentric shaft disc (6).

4. The gear pump structure for the dairy product filling capable of securing the concentricity of the eccentric shaft disc according to claim 1, characterized in that: The lower side of the crescent block (6) is provided with a concave arc surface (621), and the left end of the eccentric shaft (5) corresponds to the lower side of the concave arc surface (621); the star-shaped wheel (4) rotatably sleeved on the left end of the eccentric shaft (5) is matched with the teeth (71) provided on the right side of the toothed disc (7) and simultaneously matched with the crescent block (62), and the left side of the toothed disc (7) is provided with a toothed disc rear end surface (72), and a toothed disc shaft (721) extends in the center of the toothed disc rear end surface (72), and the toothed disc shaft (721) is connected with a power transmission device (8).

5. The gear pump structure for the dairy product filling capable of securing the concentricity of the eccentric shaft disc according to claim 4, characterized in that: The power transmission device (8) is directly connected with the toothed disc shaft (721); the sealing disc disc rim of the sealing disc (3) is sealed with the cavity wall of the pump cavity (13); the space between the eccentric shaft disc (6) and the opposite side of the partition disc (2) is formed as a first air cavity (17a) communicated with the first air inlet and outlet (15), and the space between the partition disc (2) and the opposite side of the sealing disc (3) is formed as a second air cavity (17b) communicated with the second air inlet and outlet (16).

6. The gear pump structure for the dairy product filling capable of securing the concentricity of the eccentric shaft disc according to claim 4, characterized by: The positions of the feeding port (11) and the discharging port (12) are staggered, and the position of the feeding port (11) on the pump body (1) corresponds to the toothed disc rear end surface (72), and the position of the discharging port (12) on the pump body (1) corresponds to the toothed disc teeth (71); a feeding groove (131) is concavely arranged in the pump cavity (13), and the feeding groove (131) corresponds to the lower side of the feeding port (11), and the feeding groove (131) is communicated with the discharging port (12) and forms a 90° positional relationship with the discharging port (12).

7. The gear pump structure for the dairy product filling capable of securing the concentricity of the eccentric shaft disc according to claim 1, characterized by: A positioning pin (31) is fixed on the side surface of the sealing disc (3) facing the pump cover (14), and a positioning pin limiting sleeve (141) is fixed on the side surface of the pump cover (14) facing the sealing disc (3) and corresponding to the position of the positioning pin (31), and the positioning pin (31) is inserted into the positioning pin limiting sleeve (141) and matched with the positioning pin limiting sleeve (141).

8. The gear pump structure for the dairy product filling capable of securing the concentricity of the eccentric shaft disc according to claim 1, characterized by: At least one eccentric shaft disc sealing ring groove (63) is formed on the eccentric shaft disc disc rim of the eccentric shaft disc (6), and an eccentric shaft disc sealing ring (631) is embedded in the eccentric shaft disc sealing ring groove (63) to form a sealing fit between the eccentric shaft disc (6) and the cavity wall of the pump cavity (13).

9. The gear pump structure for the dairy product filling capable of securing the concentricity of the eccentric shaft disc according to claim 5, characterized by: A partition disc disc rim sealing ring (21) for blocking the first air cavity (17a) and the second air cavity (17b) is sleeved on the partition disc disc rim of the partition disc (2), and a partition disc limiting snap ring (132) for limiting the partition disc (2) is arranged on the cavity wall of the pump cavity (13) and around the circumferential direction of the cavity wall and corresponding to the left side and the right side of the partition disc (2) respectively, and the partition disc limiting snap ring (132) is in contact with the edge of the side surface of the partition disc (2).

10. The gear pump structure for the dairy product filling capable of securing the concentricity of the eccentric shaft disc according to claim 5, characterized by: A sealing disc disc rim sealing ring (32) for sealing the second air cavity (17b) is sleeved on the sealing disc disc rim of the sealing disc (3), and the sealing disc disc rim sealing ring (32) is in sealing cooperation with the cavity wall of the pump cavity (13); in the use state, the first air inlet and outlet (15) and the second air inlet and outlet (16) are connected with the compressed air generating device pipeline, and the compressed air generating device is an air compressor, a turbo expander or a hydraulic pneumatic accumulator.

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